
I feel bad for the mc. All he wanted to do is earn some extra cash and then everything went from 0 to 50 to 100. I'm curious how the love interest will convince him to be the manager considering what he did. Then again, the mc is quite partial to him due to their history and his old perception of him so it might not take much.

If there was no kid in the equation, he would never have made an effort to insert himself back in the MCs life. I doubt he even has a slight bit of feeling for the MC. If you want to do coparenting, at least keep your rapist tendencies out of the way.

We're on the same boat. Most often than not, I always find it lazy writing for authors to add SA in the story even when it isn't necessary and not tackled sensibly. The only time SA kinda played a role in a story's development for me is in the manga Takatora-kun to Omegatachi by Asada Nemui.
Honestly, there are so many ways this webtoon could have served a story that deviates from the typical abusive alpha trope.
It would've been more realistic if they had an argument about the MC hiding their love child (excluding the rape)and the love interest talking it through to co-parent with him, then as they work together to raise their child feelings slowly bloom. But alas, we are left with this.

That depends. If this universe has a one-to-one pairing exclusively then if Ian wanted to have kids then he'd search for the omega eventually. Of he can have kids with other omegas then no problem. If this omegaverse presents with betas manifesting into omegas or alphas outside of the normal developmental phase and with the influence of pheromones/partner's pheromones then it wiloiod make sense that Ian would seek him out, otherwise if there's no possibility then there would not have been any reason for Ian to think that Noah could have been his mate. The other reasoning would have been that if Ian had been with no one else aside from being around Noah up to that point and if second gender manifestation can happen outside of regular development then yes, he would think it's possible for Noah to be the one that had marked him. So he would have likely searched for him even if Noah hadn't conceived his child.

I've seen you leave comments mostly on people who have bad opinions of the love interest. To be honest, I do not have the energy to discuss the what ifs of the story just to prove a point. Let me say this though, you do not need to make sense of everything the love interest does and try find good in every action he takes.
If the author portrays him as a dickhead with feelings, then that's just how he is and folks have the right to criticize him for being so just as much as you have the right to criticize the mc for whatever gripes you have with his personality and decisions. I'll end it at that.

It's fine but it's one-sided and it's always just about the alpha's "fault" or that "he's just being an asshole". If they have a more balanced view then yes. Without YeJun's having marked him and make him mate-bonded why would he even go after YeJun for??? Everyone is saying that to leave the omega alone to live w the child, as if the child doesn't also rightfully belong to him.
If the story turns out to be complete trash alpha, then so be it. But up to this point we don't have enough to say he's a bastard. YeJun is a complete sopping mess.
I don't like planning surprises or giving surprise gifts because it's difficult to gauge if the person I'm doing it for will like it or not. Putting all that effort only to find out their opinion is the latter scares me to hell.